The Swingarm is a lightweight and heavy duty. Purpose built around the innovative double action hinge system, offering uncompromising fit and function. OPTICS: 6 base OHM Polycarbonate lens. 100% UV protection. Up to 98% Blue Light protection. FeaturesFRAME: 6 base mould injected Grilamid frame with an innovative double action hinge system100% UV protectionMEASUREMENT: 49h - 140w - 161lWEIGHT: 29gramsCalifornia Design. Hand Crafted In Italy